Download Complete eBook By email at etutorsource@gmail.com
Download Complete eBook By email at etutorsource@gmail.com
Complete A+ Guide to IT Hardware and
Software: CompTIA A+ Exams 220-1101 &
220-1102
Cheryl A. Schmidt, Christopher Lee
IT Certification
Download Complete eBook By email at etutorsource@gmail.com
Contents
1. Introduction to the World of IT
2. Connectivity
3. On the Motherboard
4. Introduction to Configuration
5. Disassembly and Power
6. Memory
7. Storage Devices
8. Video and Multimedia Devices
9. Printers and Multifunction Devices
10. Mobile Devices
11. Computer Design and Troubleshooting Review
12. Internet Connectivity, Virtualization, and Cloud Technologies
13. Networking
14. Introduction to Operating Systems
15. Introduction to Scripting
16. Advanced Windows
17. macOS and Linux Operating Systems
18. Computer and Network Security
19. Operational Procedures (No labs for ch 19)
A. Subnetting Basics
B. Certification Exam Objectives (Online only)
Glossary
Download Complete eBook By email at etutorsource@gmail.com
Table of Contents
1. Introduction to the World of IT
Who Needs This Book?
Technician Qualities
Breaking into IT with the CompTIA A+ Certification
Basic Skills for This Course
Types of Computers
Basic Computer Hardware
Mice and Keyboards
Common Peripherals
1s and 0s
Safety Notes
Chapter Summary
Key Terms
Review Questions
Exercises
Activities
2. Connectivity
Introduction to Connectivity
External Connectivity
Mouse and Keyboard Ports
Video Ports
Audio Ports
eSATA Ports
Modem and Serial Ports
Network Ports
Network Cabling
Integrated Motherboard Ports
Getting to Know Ports
Wireless Connectivity for Input Devices
Chapter Summary
Key Terms
Review Questions
Exercises
Activities
3. On the Motherboard
Introduction to the Motherboard
Processor Overview
Processor Basics
Speeding Up Processor Operations Overview
Clocking
Download Complete eBook By email at etutorsource@gmail.com
Cache
Threading Technology
Connecting to the Processor
Multicore Processors
Graphics Processing Unit (GPU)
Introduction to Virtualization
Intel Processors
AMD Processors
CPU Sockets
Processor Cooling
Installing a Processor
Upgrading Processors
Overclocking Processors
Installing CPU Thermal Solutions
Troubleshooting Processor Issues
Expansion Slots
PCI (Peripheral Component Interconnect)
AGP (Accelerated Graphics Port)
PCIe (Peripheral Component Interconnect Express)
Motherboard Security Options
Types of Motherboards
Upgrading and Replacing Motherboards
Motherboard Troubleshooting
Chapter Summary
Key Terms
Review Questions
Exercises
Activities
4. Introduction to Configuration
Configuration Overview
BIOS Overview
The Setup Program
Flash BIOS
BIOS/UEFI Configuration Settings
CMOS Memory
Motherboard Battery
Firmware Updates: Flashing/Clearing the BIOS/UEFI
Other Configuration Parameters
Hardware Configuration Overview
Installing a USB Device
Installing an eSATA Card
Installing a Network Interface Card
Troubleshooting Configurations
Chapter Summary
Key Terms
Review Questions
Exercises
Activities
5. Disassembly and Power
Download Complete eBook By email at etutorsource@gmail.com
Disassembly Overview
Electrostatic Discharge (ESD)
Electromagnetic Interference (EMI)
Tools
Disassembly
Reassembly
Preventive Maintenance
Basic Electronics Overview
Power Supply Overview
Replacing or Upgrading a Power Supply
Power Protection
Symptoms of Power Supply Problems
Chapter Summary
Key Terms
Review Questions
Exercises
Activities
6. Memory
Memory Overview
Memory Physical Packaging
Planning a Memory Installation
Installing Memory Overview
Virtual RAM
Monitoring Memory Usage in Windows
Older Applications in Windows
Troubleshooting Memory Problems
Removable Storage
Chapter Summary
Key Terms
Review Questions
Exercises
Activities
7. Storage Devices
Storage Devices Overview
Hard Drive Overview
Solid-State Drive (SSD) Overview
Mechanical Drive Interfaces Overview
M.2 and NVMe
PATA, SATA, and SAS Connectivity
Storage Device Configuration Overview
System BIOS/UEFI Configuration for Storage Devices
Hard Drive Preparation Overview
Windows Disk Management
Fault Tolerance
Windows Storage Spaces
Disk Caching/Virtual Memory
Troubleshooting Storage Devices Overview
Data Loss and Corruption
Troubleshooting New Storage Device Installation
Download Complete eBook By email at etutorsource@gmail.com
Troubleshooting Previously Installed Storage Devices
RAID Issues
SSD Issues
Chapter Summary
Key Terms
Review Questions
Exercises
Activities
8. Video and Multimedia Devices
9. Printers and Multifunction Devices
10. Mobile Devices
11. Computer Design and Troubleshooting Review
12. Internet Connectivity, Virtualization, and Cloud Technologies
13. Networking
14. Introduction to Operating Systems
15. Introduction to Scripting
16. Advanced Windows
17. macOS and Linux Operating Systems
18. Computer and Network Security
19. Operational Procedures (No labs for ch 19)
A. Subnetting Basics
B. Certification Exam Objectives (Online only)
Glossary
Download Complete eBook By email at etutorsource@gmail.com
1. Introduction to the World of IT
In this chapter you will learn:
• Qualities a technician should have
• Basic skills needed to function in the Windows environment and in the technical world •
Important computer parts
• Basic computer terms
CompTIA Exam Objectives:
1101-3.1 Explain basic cable types and their connectors, features, and purposes.
1101-3.6 Given a scenario, deploy and configure multifunction devices/printers and
settings.
1102-4.4 Given a scenario, use common safety procedures.
1102-4.7 Given a scenario, use proper communication techniques and
professionalism.
Who Needs This Book?
More types of people than you might first think need this book. People who obviously need this
information are those who will fix computers or work on a help desk or support desk. However,
there are other types of users who might not be so obvious. Many folks who break into the
information technology (IT) world do so through jobs that require the A+ certification. Consider
medical electronics technicians who repair common equipment used in hospitals. These
technicians need this material because many medical devices connect to a PC or have PC-based
software that controls the device. Further, the medical devices commonly attach to wired and
wireless networks.
Look at Figure 1.1 to see the types of jobs and people who need the information in this book. It
might also give you ideas about something you might like to do for a career.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.1 IT roles
Technician Qualities
Each chapter includes a small bit of space on qualities a technician should possess or strive
toward. Spending a little brain power on improving what many call your "soft skills" will pay off in
promotions. Three of the most important qualities of a technician are active listening skills, a good
attitude, and logic. Active listening means that you truly listen to what a person is saying. Active
listening skills involve good eye contact, nodding your head every now and then to show that you
are following the conversation, taking notes on important details, and avoiding distractions such as
incoming calls or text messages. Clarify customer statements by asking pertinent questions and
avoid interrupting. Listen to the entire problem. Ask open-ended questions—questions that allow
the user to expand on the answer rather than answer with a single word, such as yes or no. Figure
1.2 illustrates this point.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.2 Asking technical questions
A positive attitude is probably the best quality a technician can possess. A technician with a
positive attitude does not diminish the customer's problem; every problem is equally important to
the computer user. A positive attitude is critical for being successful in the computer service
industry. Figure 1.3 shows how negative attitudes affect your success.
Figure 1.3 Have a positive attitude
Avoid developing tunnel vision (that is, thinking that there is only one answer to a problem).
Step back and look at the problem so that all possible issues can be evaluated. Be logical in your
assessment and the methods used to troubleshoot and repair. This book will help you with all of
this by explaining computer terminology in easy-to-understand terms and providing analogies that
can be used when dealing with customers.
Before delving into computer topics, you should remember that a class can't fully prepare you
for every aspect of a job. You must learn things on your own and constantly strive to update your
skills so you do not become obsolete. The IT field changes rapidly. Figure 1.4 illustrates this
concept.
We Don’t reply in this website, you need to contact by email for all chapters
Instant download. Just send email and get all chapters download.
Get all Chapters e books Instant Download by email at
etutorsource@gmail.com
You can also order by WhatsApp
https://api.whatsapp.com/send/?phone=%2B447507735190&text&type=ph
one_number&app_absent=0
Send email or WhatsApp with complete Book title, Edition Number and
Author Name.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.4 Preparing for IT job requirements
Finally, you will find that you must be a jack of all trades, as shown in Figure 1.5.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.5 Computer technician skills
Breaking into IT with the CompTIA A+ Certification
Many IT-related jobs require the A+ certification. Even if not required, the certification shows
that you have a good understanding of how computers work. This certification does not guarantee
you a job, but it does open doors in that a company may interview you if you lack IT experience but
have the A+ certification.
A+ certification requires that you take two exams: Core 1 (220-1101) and Core 2 (220-1102).
Each of these exams covers specific material. Tables 1.1 and 1.2 show the major categories
(domains) for each exam and the extent to which they are represented.
Table 1.1 CompTIA Core 1 (220-1101) A+ certification domains
Download Complete eBook By email at etutorsource@gmail.com
Table 1.2 CompTIA Core 2 (220-1102) A+ certification domains
"What are the exams like?" you might ask. The exams include multiple-choice and
performance-based questions. A performance-based question might be a drag-and-drop scenario
or might ask you to do something specific on a particular device or within a particular operating
system environment. Each exam is 90 minutes long and contains a maximum of 90 questions. The
testing system allows you to bookmark questions that you might want to return to at the end if you
have time. More information can be found on the CompTIA website (www.comptia.org).
At the beginning of each chapter, you will see a list of the CompTIA A+ exam objectives that
are covered in that chapter. At the end of each chapter, We've provided some A+ certification
Download Complete eBook By email at etutorsource@gmail.com
exam tips—tips to definitely pay attention to if you plan on taking the A+ exams. I recommend that
you review the exam objectives, study material specific to them, and take some practice exams.
Pearson IT Certification, the publisher of this book, develops many different certification exam prep
resources that suit various study styles. Go to http://pearsonitcertification.com/aplus to browse the
options.
Basic Skills for This Course
In order to repair a computer, you need a few basic skills that include being familiar with the
keyboard and inputting information, searching for information on the internet, and capturing
information. Just because you may not be a good typist does not mean that you will not be good in
an IT-related field.
Searching for Information on the Internet
IT people need to use all available resources, including online resources. As noted, you need
to be capable of searching for information online. Figure 1.6 illustrates various online resources
that IT people search all the time.
Figure 1.6 Search skills
Each chapter in the book has an activity at the end of it that enables you to practice searching
the internet for information relevant to the chapter. Tips for searching include the following: •
Search engines use different algorithms, so if one does not work, try another one. Examples of
search engines are Google, Bing, Yahoo, and Ask. To access a search engine, open a web
browser and type one of the search engine names followed by .com. Figure 1.7 shows where
you enter the search engine name in the address bar.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.7 Web browser address bar
• Use descriptive key words.
• Do not include common words like the, in, at, or for because search engines tend to skip
) in front of the
these words anyway. If you do want to use one of them, put a plus sign (
word.
• Avoid using a complex version, plural, or past tense of a word to avoid eliminating pages
that are relevant. For example, to search for how to install a Bluetooth headset, avoid using
the word installation, installed, or installing in the search window. Simply include the word
install.
• If several words are used together (an exact phrase), such as Windows 10, put quotation
marks around the phrase—"Windows 10".
• Use as many distinguishing words as possible.
• If two words have the same meaning and are commonly used, use the word or in the
search. For example, to search for generic information on a dot matrix printer, which is
sometimes called an impact printer, you might search as follows: "dot matrix" or
"impact printer". Note that the vertical bar (|), which is the key above the
key, can be used instead of the word or, as follows: "dot matrix" | "impact
printer".
• If a particular term can have two meanings (such as the word memory relating to
something inside a computer or else relating to a brain function), you can use the minus sign
in order to keep some information from being displayed. memory -brain, for example,
would be a search for memory without any brain function results included.
• If a particular term (such as memory) is generic, you can add a word and use the word
AND in order to clarify the search, such as computer AND memory.
• When searching for technical information, include the hardware or software
manufacturer. A search for Microsoft Windows 10 provides different results than a
search for Windows 10.
• If nothing relevant is on the first page of links, change the key words used in your search.
Consider the situation of a keyboard that intermittently works on a Microsoft Surface computer.
The keyboard does not come standard as part of a Surface purchase. You do not own a Surface
yourself and are unfamiliar with the tablet but must support it. An example of what might be typed
into a search engine is Microsoft Surface intermittent keyboard.
Screen Capturing
Sometimes, part of technical documentation is being able to capture what is on the screen.
Windows versions come with the Snipping Tool and Snip & Sketch; you can access these tools by
Download Complete eBook By email at etutorsource@gmail.com
holding down the
key, pressing and holding the
key, and pressing the
key. This
makes documenting problems easy, and you can copy what you capture into other applications. It
doesn't matter what IT job you may have when you enter the workforce; documentation is a part of
all IT jobs.
Creating a Text File
Another part of documentation might involve creating or using a text file, known as a .txt file.
You might need to send it as an attachment, or you might need to create a text file as part of the
job. Sometimes a text file is the easiest type of file to create, especially on a mobile device. Text
files can be created using a word processor and the Save As process, or they can be created
using an app. Text files are popular because they can be opened by many apps. Text files
commonly include only text, without multiple fonts or graphics. Windows has Notepad, and Apple
has TextEdit, which can be used to create or open text files.
Types of Computers
The simplest place to start to learn about computer technical support is with the devices
themselves. The PC, or personal computer, comes in desktop, tower, and all-in-one models, as
well as mobile models such as laptops, smartphones, and tablets. Figure 1.8 shows some of the
computing devices technical staff are expected to support.
Figure 1.8 Types of computers
Basic Computer Hardware
Download Complete eBook By email at etutorsource@gmail.com
Computer systems include hardware, software, and firmware. Hardware is something you can
touch and feel, like the physical computer and the parts inside the computer. The monitor,
keyboard, and mouse are hardware components. Software interacts with the hardware. Windows,
Linux, macOS, Microsoft 365, Google Chrome, Adobe Acrobat Reader, Intuit TurboTax, and
WordPerfect are examples of software.
Without software that directs the hardware to accomplish something, a computer is no more
than a doorstop. Every computer needs an important piece of software called an operating system,
which coordinates the interaction between hardware and software applications. The operating
system also handles the interaction between a user and the computer. Examples of operating
systems include Windows 10 and 11, macOS, and various Linux systems, such as Red Hat and
Ubuntu.
A device driver enables the operating system to recognize, control, and use a hardware
component. Device drivers are hardware and operating system specific. For example, a printer
requires a specific device driver when connected to a computer that used to have Windows 7
installed. The same printer might require a different device driver when using Windows 10 or 11.
That Windows print driver would not work on an Apple computer. Each piece of installed hardware
requires a device driver for the operating system being used. Figure 1.9 shows how hardware and
software must work together.
Figure 1.9 Hardware and software
Notice in Figure 1.9 the operating system kernel. The kernel is the central part of an operating
system. The kernel is the connection between hardware and the applications being used.
A PC typically consists of a case (chassis), a keyboard that allows users to provide input into
the computer, a monitor that outputs or displays information (shown in Figure 1.10), and a mouse
Download Complete eBook By email at etutorsource@gmail.com
that allows data input or is used to select menus and options. Figure 1.10 shows a computer
monitor, which may also be called a flat panel, display, or screen.
Figure 1.10 Computer monitor
When the computer cover or side is opened or removed, the parts inside can be identified. The
easiest part to identify is the power supply, which is the metal box normally located in a back
corner of a case. A power cord connects the power supply to a wall outlet or surge strip. One
purpose of the power supply is to convert the outlet AC voltage to DC voltage used internally in the
PC. The power supply distributes this DC voltage using power cables that connect to the various
internal computer parts. A fan located inside the power supply keeps the computer cool to prevent
damage to the components.
A PC usually has a device to store software applications and files. Two examples of storage
devices are the hard drive and optical drive. The hard drive, sometimes called the hard disk, is a
rectangular box normally inside the computer's case that is sealed to keep out dust and dirt. The
hard drive has no external opening. The computer must be opened in order to access an internal
hard drive. An optical drive holds discs (compact discs, or CDs), digital versatile discs (DVDs), or
Blu-ray discs (BDs) that have data, music, video, or software applications on them. The front of the
optical drive has a tray that ejects outward so a disc may be inserted. Figure 1.11 shows the major
components of a tower computer. Figures 1.12 through 1.14 shows components as to how they
would look before being installed. Figure 1.12 shows a hard drive. Figure 1.13 shows an optical
drive. Figure 1.14 shows a power supply. Figure 1.15 shows a tower computer case.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.11 Tower computer
Figure 1.12 Hard drive
We Don’t reply in this website, you need to contact by email for all chapters
Instant download. Just send email and get all chapters download.
Get all Chapters e books Instant Download by email at
etutorsource@gmail.com
You can also order by WhatsApp
https://api.whatsapp.com/send/?phone=%2B447507735190&text&type=ph
one_number&app_absent=0
Send email or WhatsApp with complete Book title, Edition Number and
Author Name.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.13 DVD or optical drive
Figure 1.14 Power supply
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.15 Tower case
The motherboard is the main circuit board inside a PC and contains the most electronics. It is
normally located on the bottom of a desktop or laptop computer and mounted on the side of a
tower computer. Other names for the motherboard include mainboard, planar, or system board.
External devices connect directly to the back of the motherboard or ports on the front of the
computer. Figure 1.16 shows a motherboard when it is not installed inside a computer as well as
memory and an adapter, which are covered next.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.16 Computer motherboard
The motherboard holds memory modules. Memory modules hold applications, part of the
operating system, and user documents. Random-access memory (RAM) is the most common type
of memory on the motherboard and is volatile; that is, the data inside the module is lost when
power is removed. When a user types a document in a word processing program, both the word
processing application and the document are in RAM. If the user turns the computer off without
saving the document to removable media or the hard drive, the document is lost because the
information does not stay in RAM. (Note that some applications have the ability to periodically save
a document, but this is not a guarantee that it has the latest information.) Figure 1.17 shows
memory modules when they are not installed into the motherboard memory slots. Memory is
covered in great detail in Chapter 6, "Memory."
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.17 Memory modules
A device may have a cable that connects the device to the motherboard. Other devices require
an adapter. An adapter is an electronic card that plugs into an expansion slot on the motherboard.
Other names for an adapter are controller, card, controller card, circuit card, circuit board, and
adapter board. Adapters allow someone to add functionality or an enhancement that is not
provided through the ports on the motherboard, such as better sound or video graphics or
additional ports of some type in order to connect external devices. Figure 1.18 shows an adapter.
Notice how the contacts at the bottom are a particular shape. Chapter 3, "On the Motherboard,"
goes into more detail about the types of expansion slots and adapters. You can also look back to
Figure 1.16 to see a video card/adapter installed into a motherboard expansion slot.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.18 Adapter
Tech Tip
How to identify an adapter's function
Tracing the cable attached to an adapter or looking at the device connected to an adapter
can help identify the adapter's function.
The following are the generic steps for installing adapters:
Step 1. Always follow the manufacturer's installation directions. Use an antistatic wrist
strap when handling adapters. Electrostatic discharge (ESD) can damage electronic parts.
(See Chapter 5, "Disassembly and Power," for more details on ESD.) Step 2. Be sure the
computer is powered off and unplugged.
Step 3. Remove any brackets from the case or plastic covers from the rear of the
computer that may prevent adapter installation. Install the adapter in a free expansion slot
and reattach any securing hardware.
Step 4. Attach any internal device cables that connect to the adapter, as well as any
cables that go to an external port on the adapter.
Step 5. Attach any internal or external devices to the opposite ends of the cable, if
necessary.
Step 6. Power on any external devices connected to the adapter, if applicable.
Step 7. Reattach the computer power cord and power on the computer.
Step 8. Load any application software or device drivers needed for the devices attached
to the adapter.
Download Complete eBook By email at etutorsource@gmail.com
Step 9. Test the device connected to the adapter.
See Figure 1.19 for an illustration of a motherboard, expansion slots, memory, and an adapter
in an expansion slot.
Figure 1.19 Motherboard with expansion slots and an adapter
Mice and Keyboards
Input devices, such as the mouse and keyboard, attach to the motherboard. The most common
type of mouse is an optical mouse, which has optical sensors that detect the direction in which the
mouse moves. It uses reflections from light-emitting diodes (LEDs) from almost any surface to
detect the mouse location. Mice commonly can be adjusted for sensitivity—how far you have to
move the mouse to move the cursor on the screen a desired amount. Figure 1.20 shows a photo
of the bottom of an optical mouse.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.20 Optical mouse
A keyboard is an input device that connects to a port on the motherboard or attaches
wirelessly. Features users look for in a keyboard include a separate numeric keypad for those who
have to input a great deal of numbers, adjustable tilt legs, and spill resistance. Figure 1.21 shows
the type of keyboard and mouse that are commonly used with a tower, desktop, or all-in-one
computer.
Figure 1.21 Keyboard and mouse
Download Complete eBook By email at etutorsource@gmail.com
Mouse and Keyboard Preventive Maintenance
Mouse cleaning kits are available in computer stores, but normal household supplies also work.
Use the following procedures to clean an optical mouse: Step 1. Wipe the bottom with a damp,
lint-free cloth.
Step 2. Use compressed air to clean the optical sensors.
Keyboards also need periodic cleaning. Figure 1.22 shows keyboard cleaning techniques.
Figure 1.22 Keyboard cleaning techniques
Keyboard/Mouse Troubleshooting
One of the easiest ways to determine whether a keyboard is working is to press the
or
key and watch to see if the keyboard light illuminates. Sometimes an application setting may
be causing what appears to be a keyboard problem. Use another application to see if the keyboard
is the problem. Keyboards can have LED lights that indicate particular functions. Table 1.3 lists the
most common ones. Note that different vendors label the lights in various ways.
Table 1.3 Common keyboard lights
Download Complete eBook By email at etutorsource@gmail.com
Tech Tip
One key doesn't work
If a particular key is not working properly, remove the key cap. A small, flat-tipped
screwdriver can assist with this. After removing the key cap, use compressed air around the
sticky or malfunctioning key.
If coffee or another liquid spills into a PC keyboard, all is not lost, but unplug it quickly and away
from the computer, turn it over. Use paper towels to get up what water you can. Afterward, the
keyboard can be disassembled and/or scrubbed with lint-free swabs or cloths. However, PC
keyboards and mice are normally considered throw-away technology. It is cheaper to get a new
one than to spend a lot of time trying to repair a keyboard or mouse.
Common Peripherals
Many devices connect to a computer to provide input, such as a mouse or keyboard, or output,
such as a display. Some devices can be both input and output devices, such as smart TVs,
Musical Instrument Digital Interface– (MIDI-) enabled devices (which are electronic musical
devices), touch screens, or printers. In the case of a printer, data is sent from a computer to the
printer, and the printer can send data (information), such as an out-of-ink message, back to the
computer. Figure 1.23 shows some common input and output devices.
We Don’t reply in this website, you need to contact by email for all chapters
Instant download. Just send email and get all chapters download.
Get all Chapters e books Instant Download by email at
etutorsource@gmail.com
You can also order by WhatsApp
https://api.whatsapp.com/send/?phone=%2B447507735190&text&type=ph
one_number&app_absent=0
Send email or WhatsApp with complete Book title, Edition Number and
Author Name.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.23 Input and output devices
Table 1.4 lists various peripherals that you will see used and attached to computers today. We
will be examining some of these devices in more depth and learn how to configure them, but this is
a good chapter to get the basics.
Table 1.4 Common peripherals
Download Complete eBook By email at etutorsource@gmail.com
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.24 Printer, scanner, and all-in-one printer
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.25 Camera/web cam, headset, and microphone
1s and 0s
Computers are digital devices. That means they understand 1s and 0s. One 1 or one 0 is
known as a bit. In actuality, a 1 is simply a voltage level. So, when we type characters into a word
processing application, the keyboard translates those characters into voltage levels. Figure 1.26
shows this concept. Notice that each letter is represented by a combination of eight 1s and 0s.
Each 1 is a voltage level sent to the motherboard (and components on it). Each 0 is simply the
absence of a voltage level.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.26 Binary bits
Technicians need to be able to describe capacities such as hard drive capacities and available
drive space. Eight bits grouped together are a byte. Figure 1.27 shows a hot dog divided into eight
sections (which make a big old "byte").
Figure 1.27 A byte
Approximately 1,000 bytes is a kilobyte (kB), as shown in Figure 1.28. 1 kB is 1,024 bytes to be
exact, but industry folks simply round off the number to the nearest thousand for ease of
calculation. Approximately 1 million bytes is a megabyte (MB), but a true megabyte is 1,048,576
Download Complete eBook By email at etutorsource@gmail.com
bytes. 540 megabytes is abbreviated 540 MB, or 540 M. Notice in Figure 1.29 that a megabyte
stores a lot more 1s and 0s than a kilobyte.
Figure 1.28 A kilobyte
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.29 A megabyte
Approximately 1 billion bytes (1,073,741,824 bytes) is a gigabyte (GB), which is shown as 1 GB
or 1 G. Approximately 1 trillion bytes (1,099,511,627,776 bytes) is a terabyte, which is shown as 1
TB or 1 T. Figures 1.30 and 1.31 show how storage capacities get larger.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.30 A gigabyte
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.31 A terabyte
When information needs to be expressed exactly, binary prefixes are used. For example, when
describing the value 210 (1,024), instead of saying this it is 1 kilobyte, which people tend to think of
as approximately 1,000 bytes, the term kibibyte (KiB) is used. When describing the value 220, or
1,048,576, the term mebibyte (MiB) is used. Table 1.5 shows the terms used with computer
storage capacity and binary prefixes when exact measurements are needed.
Table 1.5 Storage terms and binary prefixes
We Don’t reply in this website, you need to contact by email for all chapters
Instant download. Just send email and get all chapters download.
Get all Chapters e books Instant Download by email at
etutorsource@gmail.com
You can also order by WhatsApp
https://api.whatsapp.com/send/?phone=%2B447507735190&text&type=ph
one_number&app_absent=0
Send email or WhatsApp with complete Book title, Edition Number and
Author Name.
Download Complete eBook By email at etutorsource@gmail.com
Frequencies are also important measurements in computers because people want to know
how fast their computers, processors, memory, and other parts are operating. Frequencies are
shown in similar measurements, but instead of bits (b) or bytes (B), speeds are shown in hertz
(Hz). A hertz is a measurement of cycles per second. Something that operates at approximately 1
million cycles per second is said to operate at 1 megahertz (1 MHz). For 1 billion cycles per
second, the measurement is known as 1 gigahertz, or 1 GHz. Transfer speeds are commonly
shown in bits per second, such as gigabits per second, or Gb/s, or bytes per second, such as in
megabytes per second, or MB/s. Notice the capital letter B to indicate bytes as compared to the
lowercase b to indicate bits. These measurements are used in a lot of IT-related hardware and
software.
Safety Notes
Safety is covered in each chapter, especially in Chapter 5, but no book on computer repair can
begin without stating that both the technician and the computer can be harmed by poor safety
habits. Before beginning any PC service, remove jewelry. To protect yourself and the computer,
make sure to power off the computer and remove the power cord when disassembling, installing,
or removing hardware or when doing preventive maintenance (cleaning).
Tech Tip
Some things should be left alone
Download Complete eBook By email at etutorsource@gmail.com
Never take apart an older cathode ray tube (CRT) monitor or any power supply unless
you have been specifically trained on these components.
Technicians can also be harmed when doing menial tasks such as lifting a computer or heavy
laser printer. Lifting is a common requirement listed in IT job advertisements and explained during
interviews. Technical jobs frequently specify a maximum lifting requirement of 40 to 50 pounds.
Use proper safety precautions, such as those shown in Figure 1.32. The type of equipment you
need and things you can do to prevent harm to the computer are covered more explicitly in
Chapter 5, on power and disassembly.
Figure 1.32 Safety tips
Chapter Summary
• Many IT roles require detailed knowledge of PC hardware and software.
• Computer technicians should actively listen, have a positive attitude, and use logic when
solving problems.
• The CompTIA A+ certification requires two exams: Core 1 (220-1101) and Core 2 (2201102). Many people break into the IT field with this certification.
• IT staff must be proficient at searching for information on the internet, capturing files, and
documenting technical information.
• Computers consist of hardware (the physical parts) and software (the operating system
and applications).
• A technician needs to be able to identify important computer parts installed in a computer
and as standalone parts: case, keyboard, mouse, motherboard, monitor, power supply, hard
drive, optical drive, adapter, and memory.
• A technician needs to know the purposes of common peripherals used in industry:
printer, flatbed scanner with ADF, camera/webcam, microphone, and headset.
• Mice and keyboards are important input devices. To clean a keyboard, turn it over to
remove debris. Then use a vacuum, compressed air, or wipes to clean it.
• Safety is important when working on a computer. Power it down and remove the power
cord before working inside it.
• Use proper lifting techniques when servicing equipment.
A+ CERTIFICATION EXAM TIPS
Get a good night's rest the night before the exam.
Download Complete eBook By email at etutorsource@gmail.com
Ensure that you are knowledgeable about and proficient with all of the terms and
technologies listed in the official CompTIA A+ exam objectives. Some students study for a
particular exam by going through the objectives one by one and reviewing the material as
they go through.
Ensure that you can identify the basic parts of a computer and explain the purpose of
each one. Ensure that you know the following parts: hard drive, optical drive, power supply,
motherboard, and RAM.
Know common hardware so you will be familiar with future chapters that go into the
details of installing, configuring, and troubleshooting them: printer, flatbed scanner, ADF,
monitor, optical drive, mouse, keyboard, trackpad, drawing pad, camera/webcam,
microphone, speakers, and headset.
Know the following safety procedures: disconnect power, remove jewelry, lifting
techniques, and weight limitations.
Review the "Soft Skills" section at the end of the chapter. Make sure you know what
open-ended questions are.
Key Terms
active listening skills
adapter
ADF
bit
byte
camera
clarify customer statements
device driver
expansion slot
flatbed scanner
gigabyte
hard drive
hardware
headset
keyboard
kilobyte
megabyte
memory
microphone
monitor
motherboard
mouse
open-ended question
operating system
optical drive
PC
power supply
printer
RAM
software
terabyte
webcam
Download Complete eBook By email at etutorsource@gmail.com
Review Questions
1. Match each part to the appropriate description.
____ motherboard
a. Converts AC to DC
____ RAM
b. Holds the most data
____ DVD drive
c. Has the most electronics
____ hard drive
d. Fits in an expansion slot
____ adapter
e. Contents disappear when power is off
____ power supply
f. Holds a disc
2. A technician has been asked to provide support to an administrative assistant who is
participating in a video conferencing session. Which peripheral would be used in video
conferencing more so than in normal daily operational tasks?
[ mouse | web cam | all-in-one-printer | hard drive ]
3. Which of the following are important suggested internet search tips? (Choose two.) a. Try
another search engine if the first one does not provide satisfactory results.
b. Use as many common words as possible, like the, in, at, or for.
c. Put quotation marks around two or more words that might be found consecutively in
output.
d. Use as few words as possible.
e. Avoid using the name of the equipment manufacturer.
4. What is the acronym used to describe memory that is commonly found on a
motherboard?
5. When lifting a heavy computer, you should squat, bend at the knees, and use your legs to
lift. [ T | F ]
6. How many tests must a person take in order to be A+ certified?
[0|1|2|3|4]
7. Is the following question open ended or closed ended? You say your computer has been
running slowly since Monday. Which applications have you installed this week?
[ open ended | closed ended ]
8. List one example of having a positive attitude.
9. Which of the following devices are common output devices? (Select all that apply.) [
digital piano | speakers | display | stylus | track stick | barcode reader | printer ]
10. People who work with computers might be expected to lift up to how many pounds?
[ 10 to 20 | 20 to 30 | 30 to 40 | 40 to 50 ]
11. Which Microsoft Windows application could be used to create a text file?
[ Textpad | Notepad | WriteIt | NoteIt ]
12. Which Windows tool can be used to capture the screen?
[ Notepad | Bluetooth | Microsoft Edge | Snip & Sketch ]
Download Complete eBook By email at etutorsource@gmail.com
13. Rewrite the following conversation into an open-ended question.
Technician: Good morning. I have a service log that states you are getting an error message
whenever you access a PDF file. Have you done your Acrobat updates lately?
14. List one procedure you would do to help an erratic optical mouse.
15. Match the capacity to the description.
____ bit
a. 8 bits
____ kilobyte
b. a 1 or a 0
____ megabyte
c. approximately 1,000 bytes
____ byte
d. approximately 1 million bytes
____ gigabyte
e. approximately 1 trillion bytes
____ terabyte
f. approximately 1 billion bytes
16. Match the device to the description. Note that each description will best fit only one
answer.
____ flatbed scanner
a. has an ADF
____ adapter
b. used to feed multiple sheets of paper one page at a time
____ ADF
c. used to capture video
____ power supply
d. inserts into an expansion slot
____ webcam
e. converts AC to DC
17. Which of the following is a feature of an optical mouse?
a. LED
b. contacts
c. volatility
d. electrical conversion
18. Which device is normally found inside a computer?
[ ADF | printer | headset | hard drive ]
19. Which device normally can be seen if looking inside a desktop computer with the cover
off and when normally looking at the front of a desktop computer?
Download Complete eBook By email at etutorsource@gmail.com
[ hard drive | motherboard | optical drive | RAM ]
20. Where can you find the motherboard in a tower computer?
a. inside the power supply
b. on the side of the case
c. below the hard drive
d. beside the RAM
Exercises
Exercise 1.1 Identifying Tower Computer Parts
Objective
To identify various computer parts correctly
:
Procedur
e:
Identify each computer part in Figure 1.33. Match the part to the number in
Figure 1.34.
Figure 1.33 Tower computer parts identification
1. ______________________________________________________
2. ______________________________________________________
3. ______________________________________________________
4. ______________________________________________________
5. ______________________________________________________
6. ______________________________________________________
Download Complete eBook By email at etutorsource@gmail.com
7. ______________________________________________________
8. ______________________________________________________
9. ______________________________________________________
Figure 1.34 Second tower computer parts identification
1. __________a. Motherboard
2. __________b. RAM
3. __________c. Power supply
4. __________d. Case fan
5. __________e. Adapter
6. __________f. Optical drive
7. __________g. Case
Exercise 1.2 Identifying Computer Parts
Objective:
To identify various computer parts correctly
Procedure:
Identify each computer part in Figure 1.35.
Download Complete eBook By email at etutorsource@gmail.com
Figure 1.35 Computer parts identification
1. ______________________________________________________
2. ______________________________________________________
3. ______________________________________________________
4. ______________________________________________________
5. ______________________________________________________
6. ______________________________________________________
7. ______________________________________________________
8. ______________________________________________________
9. ______________________________________________________
10. ________
Activities
Internet Discovery
O
To obtain specific information from the internet regarding a computer or its associated
bjecti parts
ve:
Download Complete eBook By email at etutorsource@gmail.com
P
arts:
Computer with internet access
Pr
Using the internet, locate technical information about a computer. Answer the following
oced questions based on the retrieved information. Note that you may need to open more than
ure: one document in order to answer the questions.
Q
uesti
ons:
1. What is the name of the computer for which you found technical information?
2. How much RAM comes with the computer? Answers are computer dependent.
3. Which URL did you use to find this information?
4. Which search term(s) would you use for the following scenario? An HP Windows 10
computer has a Samsung ML-2160 laser printer attached. This printer supports both wired and
wireless printing. The computer that is wired to the printer can print just fine, but no wireless
devices in the house can access or even see the printer.
5. Which search term(s) would you use in a search engine to help a friend who has
accidentally deleted a file on a Windows 10 computer?
6. Which search terms would you use to find a video that shows you how to add an
application to a Windows 10 desktop computer?
Soft Skills
Obj
To enhance and fine-tune a future technician's ability to listen, communicate in both
ective: written and oral forms, and support people who use computers in a professional manner
Pro
cedure
:
1. In a team environment, list three qualities that are important in a computer technician.
Create scenarios that demonstrate these qualities. Share these findings in a clear and concise
way with the class.
2. In a team environment, list three qualities that are not good practices for computer
technicians. Create scenarios that demonstrate these qualities. Share these findings in a clear
and concise way with the class.
Critical Thinking Skills
Download Complete eBook By email at etutorsource@gmail.com
Objectiv
e:
To analyze and evaluate information as well as apply learned information to new
or different situations
Procedu
re:
1. Find an advertisement for a computer in a local computer flyer, in a newspaper, in a
magazine, in a book, or on the internet. List the components you know in one column and the
components you do not know in another column. Select one component you do not know and
research that component. On a separate piece of paper, write a description of the component,
based on your research, and then share it with at least one other person. Write the name of the
person with whom you shared.
2. Why do you think that many computer components are considered "throw-away"
technology? List your reasoning. In groups of three or four, share your thoughts. Nominate a
spokesperson to share your group reaction in two sentences or less.
3. One device touts a transfer speed of 1 Gb/s, whereas another device advertises 100
MB/s. Compare the two devices' transfer speeds and indicate which one is faster. Locate a
component you have or would like to have. Compare products paying particular attention to the
transfer speed. Document your findings.
We Don’t reply in this website, you need to contact by email for all chapters
Instant download. Just send email and get all chapters download.
Get all Chapters e books Instant Download by email at
etutorsource@gmail.com
You can also order by WhatsApp
https://api.whatsapp.com/send/?phone=%2B447507735190&text&type=ph
one_number&app_absent=0
Send email or WhatsApp with complete Book title, Edition Number and
Author Name.